diff --git a/style.css b/style.css
index 299b7f1..1e03925 100644
--- a/style.css
+++ b/style.css
@@ -12,6 +12,15 @@
   color-scheme: light dark;
 }
 
+@media (prefers-color-scheme: dark) {
+  :root {
+    --bg-lum: 0.3;
+  }
+  body {
+    background: black;
+  }
+}
+
 body {
   font-family: 'Atkinson Hyperlegible';
   line-height: 1.5;